I have tried multiple way to add my comcast.net email and have not been able to connect. Is Comcast/Xfinity email supported by mail spring?
It should be. I assume it’s a typical IMAP/SMTP account that you’re adding as such? What are your account settings (NOT account name or password)?
I think it’s because my company computer has blocked my Xfinity webmail sight that the mailspring account is not loading
Yes, I suspect you’re right, in which case it’s beyond Mailspring’s ability to help. Those are standard ports, so it should be working otherwise.